Section 12.4 – Weather Analysis and Prediction 8 th Grade Earth and Space Science Class Notes.
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Transcript of Section 12.4 – Weather Analysis and Prediction 8 th Grade Earth and Space Science Class Notes.
Section 12.4 – Weather Analysis and Prediction
8th Grade Earth and Space ScienceClass Notes
Wednesday, 5/8Warm – Up• Explain what happens at a cold front. How is a cold front represented on a weather map?• Write down the HW.
Learning Goal – Identify the various ways that weather data is collected.Agenda• Warm-Up Question/Review HW• Class notes/discussion of Section 12.3• Work on Weather Data WS (pg. 38) and 12.3 Review (pg.42)
Homework - Air Mass WS and Section 12.1 Review due by Friday, 5/10 Global Wind Systems WS and Section 12.2 Review due by Friday, 5/10 Weather Data WS (pg. 38) and Section 12.3 Review due by Friday, 5/10
Station Models
• A record of weather data for a particular site at a particular time
• Uses meteorological symbols (see Figure 12.17) for example
• All meteorologists to have a convenient and efficient way to share data
Plotting Station Model Data
• Meteorologists use lines to connect points of equal or constant values.
• Isobars – lines of equal pressure• Isotherms – lines of equal temperature
Interpreting Station Model Data
• Isobars that are close together indicate strong winds
• Isobars that are far apart indicate light winds• Indicates high and low pressure systems
Digital Forecasts
• Created by applying physical principles and math to atmospheric variables and making a prediction about how these variables will change over time
• Main method used by present day meteorologists
Analog Forecasts
• Based on comparison of current weather patterns to those of the past
• Useful for conducting monthly or seasonal forecasts
Short-Term Forecasts
• One to three days based on behavior of larger surface and upper-level features (low pressure, high pressure, etc.)
• Usually accurate for temperatures and precipitation
Long-Term Forecast
• Less reliable than short-term forecasts• 4-7 day forecasts rely on circulation patterns in
the troposphere and upper stratosphere• Forecasts for months or seasons are based on
weather cycles or patterns